From Peter King, MMQB, SI.com
... The reason officials called no hold as two Ravens mugged 49er special teamer Bruce Miller on the 108-yard kickoff return for touchdown by Jacoby Jones in the Super Bowl: Miller would have had to be taken to the ground for it to be a penalty.
Offensive holding has to go to ground??? What???
Can someone else verify that? Peter has to start quoting the section# for these outrageous claims on what the rules ARE.